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Developing S-Functions.pdf
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详细说明：MATLAB的S-Function开发说明，是S函数开发的指导说明，很有价值Revision History
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Contents
Overview of s-functions
1
What is an s-function?
1-2
Use s-Functions in models
Overview
Passing Parameters to s-Functions
When to use an s-Function
1-7
How S-Functions work
1-8
Introduction
1-8
Mathematics of simulink blocks
1-8
Simulation stages
1-8
S-Function Callback methods
1-11
Implementing S-Functions
1-12
MATLAB S-Functions
1-12
MEX S-Functions
1-13
S-Function callback methods
1-14
Callback methods Overview
1-14
Callback methods for C meX s-Functions
1-15
Callback methods for level-2 MATLAB S-Functions
1-16
S-Function Compatibility
1-19
S-Function Concepts
1-20
Direct Feedthrough
1-20
Dynamically Sized Arrays.........
1-21
Setting Sample Times and offsets
1-22
S-Function Examples
1-26
Overview of Examples
1-26
Level-2 MATLAB S-Function Examples
1-29
Level-1 MATLAB S-Function Examples
1-29
C S-Function Examples
1-30
Fortran s-Function Examples
1-34
C++ S-Function Examples
1-35
Organizing s-Function in a Simulink Project
1-35
Selecting an s-Function Implementation
Available s-Function Implementations
2-2
S-Function Types
2-3
Implement s-Functions
2-4
S-Function Features
2-7
S-Function limitations
2-12
s-Functions Incorporate Legacy C Code
2-14
Overview
2-14
Using a Hand-Written S-Function to Incorporate Legacy
Code
2-15
Using the s-Function Builder to Incorporate Legacy Code.. 2-17
Using the Legacy Code Tool to Incorporate Legacy Code
2-20
Writing S-Functions in MATLAB
Custom Blocks using MATLaB s-Functions
3-2
Write level-2 matlab s-functions
3-3
About Level-2 MATLAB S-Functions
3-3
About Run-Time Objects
3-4
Level-2 MATLAB S-Function Template
3-4
Level-2 MATLAB S-Function Callback Methods
3-5
Using the setup Method
3-6
vi Contents
Example of Writing a Level-2 MATLAB S-Function......... 3-7
nstantiating a Level-2 MATLAB S-Function
3-10
Operations for Variable-Size Signals
3-11
Generating Code from a Level-2 MATLAB S-Function
3-11
MATLAB S-Function Examples
3-11
Maintain Level-1 MATLAB S-Functions
3-12
About the maintenance of level-1 MATLAB S-Functions
3-12
Level-1 MATLAB S-Function Arguments
3-13
Level-1 MATLAB S-Function Outputs
3-14
Convert Level-1 MATLAB S-Functions to Level2∴."…·..
Define s-Function block characteristics
3-15
Processing
S-Function parameters
3-16
3-16
Writing S-Functions in C
About c s-Functions
4-2
Creating c mex s-Functions
4-4
Build s-Functions automatically
4-5
About building S-Functions Automatically
45
Deploying the g
ed s-Function
49
How the s-Function builder builds an s-function
4-9
S-Function Builder Dialog box
4-11
About s-Function builder
4-11
Parameters/s-Function Name Pane
4-13
Port/Parameter Pane
4-14
Initialization pane
4-14
Data Properties Pane....
4-16
nput Ports Pane
4-16
Output Ports Pane
4-17
Parameters pane
4-19
Data Type Attributes Pane
4-19
Libraries pane
4-20
Start pane
4-21
Outputs Pane
4-22
Continuous derivatives pane
4-24
Discrete Update Pane
音看面
4-26
Terminate pane
4-27
Build info pane
4-27
Example: Modeling a Two-Input/Two-Output System
4-28
Basic c mex s-function
4-34
Introducing an Example of a basic c mex s-Function
4-34
Defines and includes
4-36
Callback method Implementations
4-37
Simulink/Simulink Coder Interfaces
4-39
Building the Timestwo Example
4-39
Templates for c s-Functions
4-40
About the Templates for C s-Functions
4-40
S-Function Source File Requirements
鲁鲁音
4-40
The sim Struct
4-42
Data Types in S-Functions
4-43
Compiling c s-Functions
4-43
Integrate C Functions Using Legacy Code Tool
4-44
Overvie
4-44
Integrate C Functions into Simulink Models with Legacy Code
Tool
4-47
Integrate C Function Whose Arguments are pointers to
Structures
4-50
Registering Legacy Code Tool Data Structures
4-56
Declaring Legacy Code Tool Function Specifications
458
Generating and Compiling the s-Functions
4-65
Generating a Masked s-Function Block for Calling a Generated
S-Function
4-66
Forcing simulink accelerator Mode to Use S-Function tLC
Inlining Code
4-66
Calling Legacy C++ Functions
4-67
Handling multiple Registration Files
4-67
Deploying Generated S-Functions
4-68
Legacy Code Tool Examples
4-68
Legacy Code Tool Limitations...........
4-68
Simulink Engine Interaction with C s-Functions
4-70
Introduction
4-70
ProcessⅤiew,,,,,,,,,,,,,,,,,
4-70
DataⅤiew
4-77
viii Contents
Write Callback methods
4-81
S-Functions in normal mode referenced models
4-82
Supporting the Use of Multiple Instances of Referenced Models
That are in normal mode
4-83
Debug C mex s-Functions
4-84
About Debugging C MEX S-Functions
鲁春
4-84
Debug in Simulink environment
4-84
Debug Using Third-Party Software
4-88
Convert level-1 C mEX S-functions
4-92
Guidelines for Converting Level-1 C MEX S-Functions to
Level-2
4-92
Obsolete macros
4-94
Creating C++ s-Functions
Create ac++ source file
5-2
C++ references
5-2
Make C++ objects Persistent
5-3
Build c++ s-functions
Creating Fortran S-Functions
6
Create Level-2 Fortran s-Functions
6-2
About Creating Level-2 Fortran S-Functions
6-2
Template File
6-2
C/Fortran Interfacing Tips
6-2
Constructing the Gateway
6-7
Example C MEX S-Function Calling Fortran Code
6-9
Port Legacy Code.........
6-11
Find the states
6-11
Sample times
6-11
Store data
6-12
Use Flints if Needed
6-12
Considerations for real time
6-12
Run S-Function Analvzer
Check S-Functions Using s-Function Analyzer APIs
7-2
rerequ
7-2
Setup the Working environment
7-2
Run the s-Function checks
7-3
Explore and Fix Problems
75
Troubleshooting S-Function Checks
7-14
Environment checks
714
Source Code checks
7-14
S-Function meX file Checks
Input Parameter Robustness Check
7-14
716
sing Work vectors
8
DWork vector basics
8-2
What is a dwork vector?
8-2
Advantages of D Work Vectors
8-2
DWork Vectors and the Simulink engine.........8-3
DWork vectors and the simulink coder product
8-4
Types of DWork Vectors
8-5
How to Use dwork vectors
8-7
Using DWork Vectors in C MEX S-Functions
8-7
DWork Vector C MEX macros
8-10
Using DWork Vectors in Level-2 MATLAB S-Functions
8-11
x Contents
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